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Ultra-Light 11 Big Wheel
parts and supplies | item number: SUPP311DF

Ultra-Light 11" Big Wheel

Online Price: $11.95

Availability: This item is currently in stock

bulk order special available for this item

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If you are building a long-distance mousetrap powered car or rubber band powered racer then one of the most basic design concepts to understand is gearing. Gearing in its simplest of terms is how far a vehicle will travel from the amount of string that can be pulled from its drive axle. With mousetrap cars the gearing can be controlled by changing the length of the lever arm and/or changing the size of the drive axle/drive wheel system. The Ultimate Big Wheel is designed to cover almost 1 meter of linear distance for every wrap of string that is pulled from its drive axle. The Ultra-light Big Wheel is made from a very light weight corrugated plastic that has very little rotational inertia and is designed to be used with any long-distance traveling project. This is one of our best selling items and has only recently been brought back to our product line-up by popular demand. Don't miss out!


  • 11-inch drive wheel
  • for extreme distance racers
  • complete set-up with axle
Over the years we have seen many builders try to use old record albums and the problem with these old records is that they are very heavy and have a lot of rotational inertia. Doc Fizzix's Ultra-Light Big wheel weighs only 1.3 oz. and has almost no rotational inertia so your long-distance vehicle can travel much further than those who try to use old records for drive wheels. The results are mind-blowing! Ultra-light Big Wheels are cut to fit a 3/16 axle that is also included with this set-up.


The Ultra-light Big wheel is used as the primary drive wheel on long-distance traveling vehicles. Designed to use a 3/16-inch axle, for every wrap of string that is pulled from it's drive axle the Ultra-light Big wheel will travel 1 full meter. The Ultra-light Big Wheel can be used with all mousetrap car and rubber band racer distance projects.

The Ultra-light Big Wheel includes our "easy-to-wind" and "snag-free " string release system that will not tangle or snag for increased performance, a technique developed exclusively by Doc Fizzix.

Includes the following:

  • 11-inch big wheel
  • 6-inch drive axle
  • 4x spacers
  • kevlar string
  • axle hook
  • thrust washers
  • Doc Fizzix's easy-wind, snag-free propulsion system
  • Step-by-step plans with performance tips and tricks

Tools required:

  • Super glue
Size : wheel diameter = 11 inches, lever arm length = 6 inches.

Weight : 1.9 oz.

mouse trap car mouse trap car mouse trap car *Kits require assembly, actual results will vary, glue and tools not included.

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Phone Hours: Mon. - Fri. 10:00 a.m. - 5:00 p.m. (CST) - 866-362-3499 (US only) or 512-218-0454
Doc Fizzix Products, P.O. Box 5507, Round Rock TX 78683, U.S.A.